Rotary body part machining clamp and clamp system

Abstract

The utility model discloses a revolving body type part machining clamp and a clamp system, the clamp system comprises a driving assembly and a plurality of clamps, and the driving assembly is connected with the plurality of clamps through a transmission assembly. Each clamp comprises a fixing base, a first clamp body, a moving assembly, an axial positioning assembly and two second clamp bodies, the first clamp bodies are arranged on the fixing bases, and the two second clamp bodies are used for clamping the rotary body type parts placed on the first clamp bodies. The moving assembly is arranged on the fixing base and used for driving the second clamp body to move so as to clamp the rotary body type part. The axial positioning assembly is arranged at one end of the first clamp body and used for axial positioning of the rotary body type part. The fixture system can be used for effectively clamping the rotary body type part, so that the whole surface processing of the rotary body type part is realized; and moreover, multi-station operation machining is adopted, so that the rotary body type parts on a plurality of clamps can be machined by one cutter, the auxiliary operation time can be shortened, and the machining efficiency and the product consistency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining of rotary parts, in particular to a machining fixture and a fixture system for rotary parts. Background Technique

[0002] With the continuous development of China's mechanical processing manufacturing industry, numerical control machine tools are widely used in the field of mechanical processing technology due to their advanced production processes, good machining quality, etc. Fixtures are important process equipment for mechanical processing. In industrial fields such as aviation, aerospace, shipbuilding, and medical devices, the machining accuracy of parts is gradually increasing, and the role of fixtures is more prominent. They can accurately position the relative position relationship between the workpiece, the tool, and the machine tool, ensure the machining accuracy and quality of parts, quickly position and clamp the parts, and reduce the auxiliary time.

[0003] Currently, the main type of rotary fixture is to fix the rotary body by clamping from above and below (such as the machining fixture disclosed in CN108500662A). During the cutting process, such fixtures have problems: the clamping part blocks the tool and cannot perform cutting on the entire surface, and the axial positioning is inconvenient. Based on this, a machining fixture for rotary parts is needed to facilitate the machining of the entire surface. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a machining fixture and a fixture system for rotary parts, which adopt the method of lower support and clamping on both sides, can effectively leave the machining surface, facilitate the full-surface cutting of the machining surface, and at the same time can achieve the axial positioning of rotary parts with different lengths.

[0005] According to the first aspect, the utility model provides a machining fixture for rotary parts, comprising:

[0006] A fixed seat;

[0007] A first fixture body, arranged on the fixed seat and used for placing rotary parts;

[0008] Two second fixture bodies, respectively located on both sides of the first fixture body and used for clamping the rotary parts placed on the first fixture body;

[0009] A moving component, arranged on the fixed seat, and the second fixture body is arranged on the moving component. The moving component is used to drive the second fixture body to move so that the two second fixture bodies clamp the rotary parts from both sides of the first fixture body;

[0010] An axial positioning component, arranged at one end of the first fixture body and used for the axial positioning of rotary parts.

[0011] Further, the moving component includes:

[0012] A left - hand and right - hand lead screw, located below the first fixture body, has both ends of the left - hand and right - hand lead screw installed on the fixed seat through bearing seats, and the second fixture body is threadedly connected to the left - hand and right - hand lead screw.

[0013] A guide rail is provided on the fixed seat and is parallel to the left - hand and right - hand lead screw, and the second fixture body is slidably connected to the guide rail.

[0014] Furthermore, the second fixture body includes:

[0015] A mounting seat, which is threadedly connected to the left - hand and right - hand lead screw and is slidably connected to the guide rail;

[0016] A clamping arm is provided on the mounting seat and is configured to be height - adjustable.

[0017] Furthermore, a vertically - arranged first waist - shaped hole is provided on the clamping arm, and a set screw passes through the first waist - shaped hole and is connected to the mounting seat.

[0018] Furthermore, the first fixture body is installed on the fixed seat through a support seat, and the support seat is arranged perpendicular to the second fixture body so that the second fixture body is located on both sides of the support seat; a V - shaped cavity is provided on the first fixture body.

[0019] Furthermore, the axial positioning assembly includes:

[0020] A positioning seat, installed at one end of the first fixture body;

[0021] An axial positioning member is provided on the positioning seat, and its end faces the rotary - body - type part. During use, it abuts against the center of the end face of the rotary - body - type part; the axial positioning member is configured to be height - adjustable.

[0022] Furthermore, a vertically - arranged second waist - shaped hole is provided on the positioning seat, the axial positioning member passes through the second waist - shaped hole and abuts against the rotary - body - type part, and the axial positioning member is connected to the positioning seat through a nut.

[0023] Furthermore, the end of the axial positioning member that abuts against the rotary - body - type part is a ball head.

[0024] According to the second aspect, the present utility model also provides a machining fixture system for rotary - body - type parts, including: a driving assembly and a plurality of fixtures as described above, and the driving assembly is connected to the moving assemblies of the plurality of fixtures through a transmission assembly.

[0025] Furthermore, the driving assembly includes:

[0026] A driving motor;

[0027] A speed reducer, connected to the output shaft of the driving motor;

[0028] The output end of the speed reducer is drivingly connected to a plurality of the jigs through synchronous pulleys.

[0029] Working principle:

[0030] In use, place the jig flat on the workbench surface of the CNC machine tool, use a lever dial indicator to align the vertical edge and the plane, and press the pressing plate to press the mounting plate 91. Then adjust the height positions of the two clamping arms 62 of the jig according to the outer diameter dimension of the rotary body part 8. Adjust the length position of the axial positioning member 72 along the center line direction of the first jig body 5 according to the length dimension and the outer diameter dimension of the rotary body part 8, adjust the vertical height of the axial positioning member 72 to a suitable position according to the outer diameter dimension of the rotary body part 8, and then tighten its locking nut. Place the rotary body part 8 to be machined on the first jig body 5, connect the power supply, and drive the motor 11 to rotate forward. Transmit the power to the moving component through the transmission component, drive the two clamping arms 62 to approach the rotary body part 8 from both sides at the same time. After clamping the rotary body part 8, the drive motor 11 stops rotating. Then start the CNC machine tool, move the machine tool spindle 92 to run the numerical control program to machine the rotary body part 8 to be machined.

[0031] After the machining is completed, move the machine tool spindle 92 to the safe height position, start the drive motor 11 to rotate in reverse, drive the two clamping arms 62 to move in opposite directions at the same time, loosen the rotary body part 8, and manually take out the machined rotary body part 8.

[0032] Compared with the prior art, the beneficial effects of the present utility model are:

[0033] (1) A machining jig for rotary body parts provided by the present utility model can effectively clamp the rotary body parts, can not affect the movement of the machine tool spindle, and realizes the whole-surface machining of the rotary body parts.

[0034] (2) Both the second jig body and the axial positioning component can be flexibly adjusted, can be applicable to rotary body parts with different diameters and lengths, and have a wide application range.

[0035] (3) The jig system adopts multi-station operation machining. Through the drive component, the transmission component and a plurality of jigs, a cutter can machine the rotary body parts on a plurality of jigs, which can shorten the auxiliary operation time, improve the machining efficiency and the product consistency. Description of the drawings

[0036] Figure 1 It is a schematic diagram of the use state of the machining jig system for rotary body parts in Embodiment 1;

[0037] Figure 2 It is a top view of the machining jig system for rotary body parts in Embodiment 1;

[0038] Figure 3Schematic structural diagram of the machining fixture for the rotary parts in Embodiment 1;

[0039] Figure 4 Cross-sectional view of the machining fixture for the rotary parts in Embodiment 1;

[0040] Figure 5 Top view of the machining fixture for the rotary parts in Embodiment 1;

[0041] Figure 6 is Figure 5 View A in

[0042] Figure 7 is Figure 5 View B in

[0043] Reference numerals:

[0044] 11 - driving motor; 12 - speed reducer; 13 - synchronous pulley; 2 - fixed seat; 3 - support seat; 41 - right - and - left - hand lead screw; 42 - bearing block; 43 - guide rail; 44 - stop block; 5 - first fixture body; 61 - mounting seat; 62 - clamping arm; 63 - first oblong hole; 64 - set screw; 71 - positioning seat; 72 - axial positioning member; 73 - second oblong hole; 8 - rotary parts; 91 - mounting plate; 92 - machine tool spindle. Detailed implementation manners

[0045] The present utility model will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0046] Embodiment 1

[0047] As Figure 1-2 shown, this embodiment provides a machining fixture system for rotary parts, including: a driving component and multiple fixtures. The driving component is connected to the moving components of the multiple fixtures through the synchronous pulley 13, and the operation of clamping and releasing the rotary parts 8 by the multiple fixtures can be realized by using one driving component. The driving component, the synchronous pulley 13 and the multiple fixtures are installed on the mounting plate 91. When machining multiple rotary parts 8, the fixture system is placed flat on the workbench surface of the numerical control machine tool, and the vertical edge and plane are aligned by using a lever dial indicator, and the four sides of the mounting plate 91 are clamped by a pressing plate to install the fixture system on the machine tool workbench surface. Specifically, the driving component includes a driving motor 11 and a speed reducer 12. The driving motor 11 is a servo motor. Selecting a servo motor can perform closed - loop control to ensure the clamping force of the clamping device and improve the clamping accuracy. The speed reducer 12 is a worm - and - worm - wheel speed reducer. Designing with a worm - and - worm - wheel speed reducer has the advantage of self - locking, preventing the fixture from loosening during the cutting process of the rotary parts 8 and ensuring the clamping reliability. The output shaft of the driving motor 11 is connected to the speed reducer 12, and then connected to the synchronous pulley 13 through a transmission shaft to realize the synchronous movement of the multiple fixtures.

[0048] As Figure 3 shown, each fixture includes: a fixed seat 2, a first clamping body 5, a moving component, an axial positioning component and two second clamping bodies. The moving component includes: a right - hand and left - hand lead screw 41 and guide rails 43. One end of the right - hand and left - hand lead screw 41 extends out and is connected to a synchronous pulley 13, so that the driving motor 11 can drive the right - hand and left - hand lead screw 41 to rotate. Both ends of the right - hand and left - hand lead screw 41 are respectively installed on the left and right sides of the fixed seat 2 through two bearing seats 42. The bearing seats 42 are internally provided with angular contact ball bearings. The two sets of angular contact ball bearings can bear radial loads and axial loads simultaneously, are suitable for occasions with relatively high rotational precision, and adopt a back - to - back installation method, which can increase the anti - deformation ability and improve the clamping accuracy. There are two guide rails 43, which are respectively located on both sides of the right - hand and left - hand lead screw 41. Blocks 44 are provided at both ends of each guide rail 43 to limit the movement range of the mounting seat 61 and prevent it from derailing.

[0049] The second clamping body includes: a mounting seat 61 and a clamping arm 62. The left and right ends of the mounting seat 61 extend downward and are respectively slidably connected to the two guide rails 43. A nut is arranged at the lower part of the mounting seat 61, and the nut is threadedly connected to the right - hand and left - hand lead screw 41. The overall structure of the clamping arm 62 is an inverted L - shape, and one end is designed as an arc - shaped surface to facilitate fitting with the rotary - body - type part 8. A first waist - shaped hole 63 is arranged vertically on the clamping arm 62. A T - shaped set screw 64 passes through the first waist - shaped hole 63 and is connected to the mounting seat 61, so that the heights of the two clamping arms 62 are adjustable. The first clamping body 5 is installed between the two mounting seats 61 through the support seats 3 on both sides. The support seats 3 are fixedly connected to the fixed seat 2 by bolts. A through - type V - shaped cavity is designed on the first clamping body 5 for carrying the rotary - body - type part 8. The V - shaped structure has a self - centering function, can be suitable for rotary - body - type parts 8 with different diameters, and at the same time improves the clamping accuracy of the workpiece.

[0050] The axial positioning component includes: a positioning seat 71 and an axial positioning member 72. The positioning seat 71 is fixed to one end of the first clamping body 5 and is located above the support seat 3. A second waist - shaped hole 73 is provided thereon. The axial positioning member 72 passes through the second waist - shaped hole 73 and extends towards the first clamping body 5. The end thereof in contact with the rotary - body - type part 8 is a spherical head to protect the end face of the rotary - body - type part 8. The axial positioning member 72 is fixed by two nuts. By adjusting the two nuts, the height of the axial positioning member 72 can be adjusted to align it with the center line of the first clamping body 5, and the length position of the axial positioning member 72 along the center line direction of the first clamping body 5 can be adjusted to achieve the positioning of rotary - body - type parts 8 with different lengths, and the application range is wide.

[0051] The V - shaped structure of the first clamping body 5, the adjustable height of the clamping arm 62, and the height and length adjustment of the axial positioning member 72 make the fixture suitable for the positioning of different rotary - body - type parts 8.

[0052] The using process of the fixture system is as follows:

[0053] Step 1: Place the fixture flat on the workbench of the CNC machine tool. Use a lever dial indicator to align the vertical edge and plane, and then press and clamp the four sides of the mounting plate 91 with a pressure plate.

[0054] Step 2: Adjust the height positions of the left and right two clamping arms 62 in each fixture according to the outer diameter dimension of the rotary body part 8. Loosen the set screw 64 at the position of the first waist-shaped hole 63, adjust the clamping arm 62 to an appropriate height and ensure parallelism, and then tighten the set screw 64 to fix it on the mounting seat 61.

[0055] Step 3: Adjust the axial length position of the axial positioning member 72 in each fixture according to the length dimension and outer diameter dimension of the rotary body part 8. Loosen the two nuts on the axial positioning member 72 at the second waist-shaped hole 73, adjust the length position of the axial positioning member 72 along the center line direction of the first fixture body 5 according to the length dimension of the rotary body part 8, adjust the upper and lower height of the axial positioning member 72 to an appropriate position according to the outer diameter dimension of the rotary body part 8, and then tighten the two nuts.

[0056] Step 4: Place the rotary body parts 8 to be machined on the first fixture body 5 in each fixture respectively, connect the power supply of the joint, start the driving motor 11 to rotate forward, transmit the power to the moving components of each fixture through the synchronous belt pulley, drive the forward and reverse lead screw 41 to rotate, and then make the clamping arms 62 on the left and right two mounting seats 61 approach and clamp the rotary body parts 8 simultaneously. After clamping, the driving motor 11 stops rotating.

[0057] Step 5: Start the CNC machine tool, move the machine tool spindle 92 to run the NC program to machine the rotary body parts 8 to be machined one by one.

[0058] Step 6: After machining, move the machine tool spindle 92 to a safe height position, start the driving motor 11 to rotate in reverse, the left and right two clamping arms 62 move in opposite directions simultaneously to loosen the clamping, and manually take out the machined rotary body parts from the fixture.

[0059] Step 7: Repeat the above steps 2 to 6 to complete the machining of the subsequent rotary body parts 8.

[0060] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A machining fixture for a rotary body part, characterized in that, Comprising: A fixed seat (2); A first clamping body (5) provided on the fixed seat (2) for placing rotary parts (8); Two second clamping bodies located on both sides of the first clamping body (5) for clamping the rotary parts (8) placed on the first clamping body (5); A moving component provided on the fixed seat (2), the second clamping body is provided on the moving component, and the moving component is used to drive the second clamping body to move so that the two second clamping bodies clamp the rotary parts (8) from both sides of the first clamping body (5); An axial positioning component provided at one end of the first clamping body (5) for axial positioning of the rotary parts (8).

2. The machining fixture for rotary parts according to claim 1, characterized in that, The moving component includes: A left - right hand lead screw (41) located below the first clamping body (5), both ends of the left - right hand lead screw (41) are installed on the fixed seat (2) through bearing seats (42), and the second clamping body is threadedly connected to the left - right hand lead screw (41); A guide rail (43) provided on the fixed seat (2) and parallel to the left - right hand lead screw (41), and the second clamping body is slidably connected to the guide rail (43).

3. The machining fixture for rotary parts according to claim 2, characterized in that, The second clamping body includes: A mounting seat (61) threadedly connected to the left - right hand lead screw (41) and slidably connected to the guide rail (43); A clamping arm (62) provided on the mounting seat (61) and configured to be height - adjustable.

4. The machining fixture for rotary parts according to claim 3, characterized in that, A first oblong hole (63) arranged vertically is provided on the clamping arm (62), and a set screw (64) passes through the first oblong hole (63) and is connected to the mounting seat (61).

5. The machining fixture for rotary parts according to claim 1, characterized in that, The first clamping body (5) is installed on the fixed seat (2) through a support seat (3), the support seat (3) is perpendicular to the second clamping body so that the second clamping body is located on both sides of the support seat (3); a V - shaped cavity is provided on the first clamping body (5).

6. The machining fixture for rotary parts according to claim 1, characterized in that, The axial positioning component includes: A positioning seat (71) installed at one end of the first clamping body (5); An axial positioning member (72) provided on the positioning seat (71), its end facing the rotary parts (8), and when in use, it abuts against the center of the end face of the rotary parts (8); the axial positioning member (72) is configured to be height - adjustable.

7. The machining fixture for rotary parts according to claim 6, characterized in that, A second oblong hole (73) arranged vertically is provided on the positioning seat (71), the axial positioning member (72) passes through the second oblong hole (73) and abuts against the rotary parts (8), and the axial positioning member (72) is connected to the positioning seat (71) through a nut.

8. The machining fixture for rotary parts according to claim 6 or 7, characterized in that, One end of the axial positioning member (72) in contact with the rotary parts (8) is a ball head.

9. A machining fixture system for a rotary body part, characterized in that, Comprising: A driving component and a plurality of jigs as described in any one of claims 1 - 8, and the driving component is connected to the plurality of jigs through a transmission component.

10. The machining fixture system for rotary parts according to claim 9, characterized in that, The driving component includes: A driving motor (11); A speed reducer (12) connected to the output shaft of the driving motor (11); The output end of the speed reducer (12) is in transmission connection with the moving components of the plurality of jigs through a synchronous pulley (13).

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